Magneto generator



Jail 28, 1941- E. B. Nowosn-:LsKl 2,230,007

MAGNETO GENERATOR Filed May 11, 1937 3 Sheets-Sheet 1 INVENTOR. Olmes/s:fdwa/fd.

. TORNEY.

Jam 28, 1941- E. B. NowosIELsKl MAGNETO GENERATOR Filed May l1, 1937 3Sheets-Sheet 2 INVENTOR.

Jan 28, 1941- E. B. NowoslELsKl 2,230,007

MAGNETO GENERATOR 3 Sheets-Sheet 5 Filed May l1, 1937 l INVENTOR.fda/715665. /lmuosllelki/ BY MR/imi? Patented Jan. 2s, 1941 A '2,230,007

yUNITED STATES ra'rlsmV OFFICE MAGNETO GENERATOR Edward B. Nowosielski,Sidney, N. Y., assignor to Bendix Aviation Corporation, South Bend,Ind., a corporation of Delaware Application May 11; 1937, serial No.141,943

s claims. (c1. 1v1-i269) The present invention relates to a magnetochamber 2, a breaker mechanism chamber 3 and generator and moreparticularly to an ignition a distributor mechanism chamber 4. generatorfor n'iulti-cylinder4 internal combusl Two groups 5 and 6 of circularlyarranged tion engines. 'arcuate permanent magnets (Fig. 4) are flxedlyIt is an object of the present invention to promounted in the ends ofthe generator chamber 5 `vide a novel form of, high tension magnetowhich 2 with pole pieces 1 and 8 interposed between the lis emcient andreliable although small and light adjacent like poles .of the magnets 5and 6, said for its output capacity. pole pieces extending radiallyinward and being It is another object to provide such a device formedwith arcuate surfaces 9 and II. Pole l0 which is capable of producingeillciently a large pieces 'i and 8 of like polarity are connected by I0number of sparks for each revolution of vthe bolts I2 traversing the endpartitions I3 and I4 driving shaft. I of the generator chamber formaintaining the It is a furtherobject to provide such a de- -parts inassembled relation. vice which employs a plurality 0i small nxed Thegenerator chamber is formed in two secmagnets, the ux from which iscaused t0 com.. tions joined as indicated at I0, and an induction l5bine and reciprocate through/he core of a, stacoil I5 is mounted in thecentral portion theretionary coil a plurality of times for each revolu-Of. being rigidly held in D0Siti0l1 by the Clamping .tion of a rotor.action of the bolts I2.

It is another object to provide such e, device A drive shaft I6 isjournalled at I'i andi in v which 1S readily adaptable for use lnconnection the partitions I3, I4 and carries rigidly keyed 20 withengines having various numbers of cylin.. thereon in any suitable manneras indicated at ders. I9 and 2| an inductor member comprising a It isanother'objeef; to provlde Such a device laminated cylindrical coremember 22 traversing which ls completely enclosed and shlelded ln a theinduction coil I5, and lamlnated c1rcular substantially smooth andsymmetrical casing. pole* members z3 and 24 xedpn @he ends 0f the 25 Itls another Object to provide such a device core and having arcuateprolections 21 and `2B ln Whleh the' magnets and con are stationary,adapted to cooperate w1th the pole p1eces land the reversals of ux beingsecured by rotation s of 'the permaqent-magnets In 'the arrange' of acomparatively light rotor, and the magnetic ment illustrate@ m Flg' 4'there are eight Perma' circuit through vthe coil being completed bymagnent magnets m each 'group 5 and 6 and ac' 30 netic conductorssurrounding the coil, thus incordmgly elght xed pole membes 1 and 8creasing the inductive effect thereon. gllrege; roclrllasclluagmjolepahrmbltsfoiigvgggigutanan tions 21 and 28 respectively, whichprojections of each pole member are accordingly adapted 'to 35` liuonmth the accompanying drawings in simultaneously cooperate with the fixedpole Fig. 1 is a vertical substantially mid-sectional pieces of hkepma'nty' The projectlons 2T of view of apreferred embodiment of theinvention; pole member z3 are staggered rotaly with respect totheprojections 28 of pole member 24 40 lil 22 ifamsgeclfm takensubstantlany on the whereby when theI pole member 23 is in induc- 40tive relation with the xed pole pieces 'i of one Fig' 3 is a' Sectlontaken Substantlauy on the polarity, the pole member 24 is in inductivereune of Fig- 1; lation with the xed pole pieces 8 .of the oppo- F1g- 41S a detail m Perspecmve 0f the elements site polarity. Closed magneticcircuits are thus forming the magnetic circuits 0f the device? providedfor the flux from all the permanent 45 Fig. 5 1S a detail in DeXSpectiVe0f an element Y magnets, said flux flowing 'in one direction 0f themegnetl Inductor; through the core 22 of the rotor and returning Fig. 61s a detail in perspective 0f one 0f the through the exterior pathformed by the bolts permanent magnets employed: and l2 surrounding theinduction coil as indicated Fig. '7 is a detail in perspective of one ofthe by the arrows in Fig. 4. 50 fixed pole pieces interposed betweensaid mag- The breaker chamber 3`of casing I contains nets. breakermechanism indicated generally by nu- Referring rst to Fig. 1 of thedrawings, there meral 29, and drive shaft I6 projects into said isillustrated) a generally cylindrical casing I chamber and carries a. cam3| xed thereon for comprising three chambers, namely a generatoroperating the breaker mechanism. The breaker 55 gli mechanism isconnected to the primary winding' of the coil l5 by a conductor 32, andthe breaker points are shunted by a suitable condenser 33 in the usualmanner.

Distributor mechanism indicated generally by numeral 3Q is mounted inthe distributor chamber i of the casing and comprises a distributorrotor 35 journalled as indicated at St in the casing and provided with aconductor Si electrically connected to a central electrode 38 andarranged to cooperate at its ends with a plurality of output electrodes3Q and All. The central electrode Sii is connected by a conductor i2with a high tension cable @3 coming from the secondary winding of theinduction coil i5. The electrodes Sill, 39 and il and conductor d@ arepreferably molded in a cup M of suitable dielectric material which isretained in the chamber l by any suitable means as indicated at (l5.

The distributor rotor 35 is actuated by the drive shaft i6 throughreduction gearing of such ratio as to adapt the'- device for theparticular engine installation contemplated. Thus, inthe embodimentillustrated, the device is adaptedfor the ignition of afourteen-cylinder engine. There are accordingly seven electrodes 39 andseven electrodes 4l, and gearing is provided whereby the distributorrotor is driven at a ratio of 4:7 with respect to the drive shaft.' Ashere shown, this is accomplished by mounting an external gear i6 on thedrive shaft in position to mesh with an internal gear i'l journalled asindicated at All in therchamber and fixed to the rotor i5 by means of acap screw B8, the proper timing relation between the gear anddistributor rotor being secured bysvuitable means such as a dowel 39.

In the operation of the device, rotation of drive shaft i6 causes theinductor rotor 22, 23, 263 to rotate therewith, causing the pole shoes2l, 2a thereof to cooperate'alternately with the xed pole pieces l andil of opposite polarity. The ux of the permanent magnets 5 and t is thuscaused to reciprocate through the core 22 of the inductor member eighttimes during each revolution of the drive shaft and thereby inducecurrents corresponding thereto in the coil l 5, the magnetic circuitsbeing completed through the bolts l2 surrounding the coil and therebyaugmenting the inductive effect therein. The cam 3l operates the breakermechanism 29 to lopen and close the primary circuit-of thecoil in theusual manner, and the secondary impulses so generated are conducted bythe cable d3 to the distributor rotor 35. Since the rotor 35 is gearedto make one revolution while the inductor is making one and three-`quarters revolutions, there will be fourteen impulses generated for eachrevolution of the rotor, which accordingly serves to properly distributethe same to the spark plugs of the engine to be ignited. f

It will be readily understood that this arrangement is very flexible asrespects adaptation for various engine installations, since it is merelynecessary to change the distributor cap and/or vary the ratio of thereduction gearing 46, 41 in order to use this device for the ignition ofengines having various numbers of cylinders. The numbers of permanentmagnets used may also be varied widely without changing the basic designof the device, inasmuch as neither the magnets-nor the coil rotate, theonly rotating element being the inductor which is of simple `design,symmetrical and easily balanced.

Although but one embodiment of the invention has been shown anddescribed in detail, it will be understood that other embodiments arepossible and various changes may be made vin. the design and arrangementof the parts without departing from the spirit of the invention as de- 5'lned in the claims appended hereto. What is claimed is:

l. In a magneto, a sectional casing, a plurality r of magnets arrangedtherein in spaced annular groups, an induction coil interposed betweensaid l groups coaxial therewith, a drive shaft traversing concentricallysaid coil and magnets, an inductor rotor xed on said shaft arranged toconduct the ux from said magnets through said coil, and a plurality ofbolts arranged about the pel riphery of the coil forunifying the casingand serving as a return path foi-the flux traversing the coil.

2. in a high tension ignition magneto for internal combustion engines, aplurality of arcuate magnets arranged in spaced annular groups with likepoles adjacent, fixed pole pieces between said poles and extendinginwardly therefrom, a xed induction coil -lccated between said groups ofmagnets coaxially therewith having a. hollow core, and a rotary inductorof highly permeable material comprising a cylindrical portion traversingsaid core, and pole members at its ends arranged to cooperate with saidfixed pole pieces.

3. In a high tension ignition magneto for internal combustion engines, aplurality of arcuate magnets arranged in spaced annular groups with likepoles adjacent, xed pole pieces between said poles and extendinginwardly therefrom, a lxed induction coil located between said groups ofmagnets coaxially therewith having a hollow core, and a rotary inductorof highly permeable material comprising a cylindrical portion traversingsaid core and circular pole members at its ends having pole shoesarranged so that each pole member cooperates with a group of pole piecesof like polarity, the arrangement being such that the two pole memberssimultaneously cooperate with groups of pole pieces of oppositepolarity.

d. l'n a high tension ignition magneto for internal combustion engines,a plurality of arcuate magnets arranged in a pair of coaxial spacedannular groups with like poles adjacent, lxed pole pieces between saidpoles and extending inwardly therefrom, a xed induction coillocatedbetween said groups of magnets coaxially therewith having 'a hollowcore, a rotary inductor of highly permeable material comprising acylindrical portion traversing said core and circular pole members atits ends arranged to cooperate with said xed pole pieces, and meansforming a yreturn path for the flux traversing the inductor. A

5.k In a high tension ignition magneto forinternal combustion engines,a. plurality of arcuate magnets arranged in a pair of coaxial spacedannular ygroups with like poles adjacent, xed pole pieces between saidpoles and extending inwardly therefrom, a xed induction coil locatedbetween said groups of magnets coaxially therewith having a hollow core,a rotary inductor of highly permeable material comprising a cylindricalportion traversing said core and circular pole members at its endsarranged to cooperate with said fixed pole pieces, and a plurality ofbars of highly permeable material arrangedperipherallyto said coilconnecting pairs of said pole piecesl of like polarity ln said groups.

6. In a. high tension magneto generator, a cas'.- ingcomprising threevvsubstantially cylindrical 75 chambers arranged end to end. one chambercontaining generating means including a coil, iixed magnets, and aninductor causing the ilux from the magnets to reciprocate through thecoil; 5 breaker means `in the second chamber including a cam;distributor means in the third chamber including a rotor, a conductortraversing the breaker chamber transmitting the output of the coil tothe distributor mechanism, a shaft journalled in the casing carrying androtating the inductor and cam, and gearing connecting the shaft to thedistributor rotor for driving it in 5 timed relation to the inductor andcam.

EDWARD B. NOWOSIELSKI.

